Lubrication of mechanism



Patented June 12', 1928;:

, UNITED STATES. PATENT OFFICE.

enemas mm, or cum, rmcn.

LUBBICATION OI IECHAHISI.

1T0 Drawing. Application filed June .2, 1828, Serial 10. 113,813, and in France June 11, 1925.

6 sheep-foot oil, etc.). These oils being composed, however, of triglycerides decompose in use, the lubricant becoming thicker, frequently attacking the metals lubricated.

In order to overcome this defect, it has been proposed to replace the fatty oils with mineral oils: These, however, while altering less have not given good results, and it has been found that this is due to the effect caused by the metal attracting the oil which little by little leaves the place where it was put and progressively extends over the adjoining metallic surfaces, so that at the end of a certain time the parts lubricated retain a small quantity onlyof the lubricant, and so a quantity insufiicient to ensure suitable lubrication.

It has also been found that a lubricating oil better resisted the attraction of the metal the greater the cohesion properties it possesses; now if the molecules of fatty oils (triglycerides) contain centres of energy imparting to them a high cohesion, mineral oils (formed of saturated hydrocarbonsf) on the contrary are nearly completely free rom such centres of energy and possess little cohesion which is the more marked when by previous careful refinement all non-saturated molecules have been eliminated.

To obtain with mineral oils a durable lubrication of mechanical elements, the field of forces which emanate from the surface of the parts to be lubricated are according to this invention, previously neutralized by depositing upon said parts a continuous laver (which may be infinitely thin) of a substance Whose active molecules become powerfully attached to the surface of said arts so that externally such surface will t ereafter possess a ver attentuated field of forces. The molecu es of a lubricant possessing small cohesion, such as a saturated mineral oil, when deposited upon a part so treated, is no longer subjected to substantial attraction and thus has no tendency to spread.

This preliminary treatment of the surface of the parts to be lubricated may be effected with any agent which neutralizes the superficial fields of force saturated fatty acidsbeing peculiarly suitable.

The neutralizing molecules deposited as v a preliminary upon the surface of the part to be lubricated, may be in the form of a solid, or a liquid, but referably a solid.

For example, to which this invention is not confined the parts to be lubricated may be immersed in a weak solution, 1% for example of stearic acid in a volatile solvent such as benzene or toluene, for a few minutes, the parts are then withdrawn from the bath and allowed to dry in the atmosphere. They are then stoved at 100 C; their surface rubbed with a soft rag or a chamois leather previously steeped preferabl in the said solution of stearic acid and ried; the parts are then dried and are ready to be lubricated.

What I claim is:

1. The process of lubricating which comprises coating with a neutralizmg substance a surface extending outside and around the surface to be lubricated and subsequently applying to the surface to be lubricated a lubricant having small cohesive properties whereby creeping of the lubricant is prevented.

2. The process of lubricatin which comprises coating with a neutralizing substance an annular surface around the surface to be lubricated and subsequently applying to the surface to be lubricated a lubricant having small cohesive properties whereby creeping of the lubricant is prevented.

3. The process of lubricatin prises coating with a saturated fatty acid a surface extending outside and around the surface to be lubricated and subsequently applying to the surface to be lubricated a lubricant having small cohesive properties whereby creeping is prevented.

4. The process of lubricating which comprises coating with a solution of a fatty acid in a volatile solvent a surface extending outside and around the surface to be Inbricated, driving off said solvent and subsequently applying to the surface to be lubricated a lubricant having small cohesive properties whereby creeping is prevented.

5. The process of lubricating which comprises coating with a neutralizing substance a surface extending outside and around the surface to be lubricated and subsequently applying to the surface to be lubricated mineral oil as a lubricant whereby creeping is prevented.

6. The process of lubricatin which comprises coating with a. saturate fatty acid a which comsurface extendin outside and'around the surface to be In ricated and subsequently applying to the surface to be lubricated mineral oil as a lubricant whereby creeping is prevented.

7. The process of lubricating which comprises coating with a solution of a fatty acid in a volatile solvent a surface extending outside and around the surface to be lubricated, driving off said solvent and subsequently applying to the surface to be lubricated mineral oil as a lubricant whereby creeping is prevented.

8. The process for preventing creepin in lubricated elements which comprises dipping the parts to be lubricated in a solution of not more than one per centum of stearic acid in a volatile solvent allowing said parts to dry, heat treating said parts, rubbing the surface of said arts with chamois previously steeped 1n the said solution of stearic acid and subsequently re-drying the said parts.

9. The process for preventing creeping in lubricated elements which comprises dipping the parts to be lubricated in a solution of not more than one per centum of stearic acid in benzine, allowing said parts to dry, heating said parts at 100 0., rubbing the surface of said parts with a soft material previously stee ed in the said solution of stearic acid an dried and subsequently redrying the said parts.

In testimony whereof I have affixed my signature.

GEORGES WISNER. 

